About MST Events
MST Events has been organising events for 15 years, and the team of four behind it brings decades of experience between them. We are Ceri, Ellie, Kirsty and Oli — CEKO — and we are there at every event we put on.
We organise the Mapledurham 10 & Half in November and the Gut Buster between Christmas and New Year: one a fast, scenic road race, the other a muddy, water-filled adventure to work off the mince pies.
From fast road races to muddy adventures, our events are built to be enjoyable as well as demanding — well marshalled, characterful, and welcoming whether you are chasing a time or simply out for the fun of it.
Our Events
The Mapledurham 10 & Half in November and the Gut Buster between Christmas and New Year — a fast road race and a muddy, water-filled adventure, both with the same friendly welcome.
29th November 2026
Mapledurham 10 Mile, 10K & Half Marathon
Something of a classic on the trail run calendar, the Mapledurham 10 and half will be back in 2026 for it's 13th year. The 10K, 10 mile & Half Marathon courses will take you through a variety of muddy paths, woodland trails, private estate roads and across fields and up and down a few hills!!! ...
28th December 2026
Gut Buster
The iconic GUT BUSTER, the best way to end the year.... water crossings, Roman Walls, fields, footpaths, and what is sometimes the hardest last 400m in British Athletics [farmer/ crop rotation dependent]. The epic mud-fest of 2017 and 2022 will be talked about for years to come…what more excuse ...
Why MST Events
Unique Challenges
From fast road races to muddy, water-filled adventures, MST Events creates distinctive challenges that are as enjoyable as they are demanding.
Beautiful Locations
Discover stunning routes through scenic countryside and picturesque locations, giving every race a memorable backdrop from the start line to finish.
Friendly Atmosphere
Welcoming runners, supportive marshals and a strong community spirit create inclusive events where everyone can enjoy the challenge and feel encouraged.
Made to Remember
Thoughtful organisation, characterful courses and memorable race-day touches ensure every MST event offers more than simply another finish time.
What Runners Say
“ Really well organised event with a lovely family feel. Course was well laid out and a beautiful run. Would definitely do again! ”
Kirsten S. — Gut Buster
“ A really friendly and inclusive event, with a challenging but fun and varied course. The volunteer marshals are amazing. ”
Jen W. — Gut Buster
“ Fantastic event — great marshalling, super supportive. There is a ford you can avoid, a stream you can't and 2k of mud at the end. Lots of fun! ”
Twitter